What does fault code TCM-003A mean?

Diagnostic fault code details for TCM-003A (Volvo C30 (2007–2013), Volvo C30 (2007–2013), Volvo C30 (2007–2013)). Repair service at OBD Tuning.

VOLVO

TCM-003A - Gear-shift position sensor. Faulty signal

System

Transmission Control Module (TCM)

Volvo models this fault code applies to

Applies to the following models:

4 models

C30 (2007–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)

Show models by year and engine (10)

What does this fault code mean?

The gear lever position (P, R, N or D) reaches the gear-shift position sensor, which is built into the transmission control module, through a cable. The sensor is of Hall type, and the control module has registered an incorrect signal from one of the Hall sensors.

Possible causes

The gear-shift position sensor is damaged
The connector or cable is damaged

What you can do

1Have a workshop confirm that the gearshift cable is adjusted properly, and adjust it if needed
2If you have a diagnostic tool: compare the gear shown in live data with the position of the lever when you move it to P, R, N and D
3Clear the fault code and check whether it returns
4If the fault remains, have a workshop check the connector and wiring to the gear-shift position sensor, and replace the mechatronic unit if the sensor is at fault

Symptoms you may notice1

No noticeable symptoms for the driver

General guidance for car owners. Diagnosis on the car can point to a different cause.